Re: Extreme high load with 12/7 4-releng

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From
Matt Dillon <dillon@earth.backplane.com>
Date
13 Dec 2000 00:14:59
Subject
Re: Extreme high load with 12/7 4-releng
Message-ID
200012130814.eBD8EvD81021@earth.backplane.com


[ Hide this part ]
 
:On Tue, Dec 12, 2000 at 06:09:00PM -0800, Matt Dillon wrote:
:> To give you an idea on the difference in performance, running a program
:> on my test box to iterate through a huge (3xMain-memory) file via mmap,
:> alternately touching 8K and accessing 8K, resulted in long system stalls
:> and a pidly pageout rate of maybe 2MB/sec. To disk.
:
:Would you be willing to post your test for people to play with if they
:care to?

Sure. I put my linear pageout daemon tester on my
site: http://apollo.backplane.com/FreeBSD4/

It isn't very sophisticated.

I need to get Paul's permission to put the filesystem thrasher /
low-memory test Yahoo was using up. That test is a great deal more
sophisticated.

-Matt



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